Abstract—

It is known that the results of calculations for various criterial models of convective heat transfer may differ from each other, which, according to existing ideas, is usually associated with different operating conditions of the heat exchangers under study. In the work, thermal engineering experiments are carried out with a laboratory water-to-water tubular heat exchanger of the “pipe-in-pipe” type with smooth tubes at normal pressure and moderate temperatures at various inlet temperatures of the heat carriers and their flow rates. The results of the experiment are compared with the results of calculations based on the models of B.S. Petukhova, S.S. Kutateladze, Nusselt, and M.A. Mikheev. The comparison shows that the discrepancies between the experiment and the models, as well as between the models themselves, stem not only from experimental inaccuracies, but also from inaccuracies in the models themselves.

中文翻译：

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关于对流传热的一些临界模型

摘要-

众所周知，各种对流换热标准模型的计算结果可能各不相同，按照现有的观点，这通常与所研究的换热器的不同运行条件有关。在这项工作中，热工实验是在常压和中等温度下，在热载体的不同入口温度下，用光滑管的“管中管”型实验室水-水管式换热器及其热载体进行的。流量。实验结果与基于 BS Petukhova、SS Kutateladze、Nusselt 和 MA Mikheev 模型的计算结果进行了比较。比较表明，实验与模型之间以及模型本身之间的差异，